Updates

More than 25,000 people attended the protest in New York City, The New York Timesreported.

The number reported by the Time is more than double what police initially told reporters. Many participants estimated even higher numbers and the Times reported that the procession stretched more than a mile.

The names and faces of the victims were everywhere. On signs, in chants, on clothing and pins. As the marchers filed out, away from the Capitol, back up Pennsylvania Avenue, they passed vendors selling shirts, hoodies, framed posters, 2015 calendars, gloves, lanyards, hand-warmers, key-chains&mdash;nearly all bearing "Hands up, don't shoot" or "I can&#39;t breathe" or "Black lives matter."

Protesters in Washington D.C. have paused before the Capitol building to listen to speeches, including one delivered by Rev. Al Sharpton.

"This is not a black march or a white march," Sharpton told the crowd, according to the Washington Post. "This is an American march so the rights of all Americans are protected. I'm inspired when I see white kids holding up signs saying &#39;Black Lives Matter.&#39;"

On Saturday, Rev. Al Sharpton will lead a civil rights march through Washington D.C., which organizers hope will be among the largest demonstrations against police tactics used on black men.

Protesters have been bussed in from New York City to attend the "Justice For All" march, which will end in front of the U.S. Capitol building.

Demonstrations are also scheduled in San Francisco and New York, where a "Millions March NYC" event is planned to join in solidarity with the "Justice For All" march. Protests are also slated in Lexington, Kentucky; Austin, Texas; and in Kansas City, Missouri, the Washington Post reported.

The protests are designed to bring attention to the recent grand jury decisions to not indict the officers who killed two unarmed black men: Eric Garner of Staten Island, New York, who was placed in an illegal police chokehold; and Michael Brown of Ferguson, Missouri, whose death in August triggered protests and riots in St. Louis and throughout the nation.

Others recently killed by police include 12-year-old Tamir Rice, who was shot for holding an airsoft pellet gun, and John Crawford III, who was gunned down in a Walmart while holding a toy rifle.